NdFeB magnet is mainly made of Neodymium&comma; Iron and Boron&comma; with excellent magnetic property&comma; abundant raw material and reasonable prices&comma; NdFeB Magnet can be used as an ideal magnet in mini-motor&comma; Permanent magnetic resonance&comma; sound device magnetic suspension system&comma; magnetic transmission machine and iatrical apparatus and etc&period; For NdFeB&comma; its surface is usually treatd with some special methods&period; The surface treatment method include zinc&comma; Nickel&comma; Tin&comma; Silver&comma; Gold plating&comma; Phosphor and Spray Epoxy Resin etc&period;